Time Team have been invited by pupils of Thetford Grammar School in Norfolk, to investigate the remains of a Dominican friary church and a 1,000-year-old Norman cathedral, in their playground. There is much interest from the pupils when the team excavate human bones. Ecclesiastical historian Janet Burton describes the origins of the Dominican Order. Stonemason Simon Williams gives a practical demonstration of medieval wall-building using knapped flint and lime mortar. Stained glass expert David King confirms medieval dates for fragments from the friary. The junior school makes a timeline frieze, complete with felt bishops and monks. It all ends in an open evening for parents.